Explosion-engine with dynamomagnetic ignition.



P. BOSSU.

EXPLOSION ENGINE WITH DYNAMOMAGNETIC IGNITION.

APPLICATION FILED AU G.3l,1915.

Patented July 9, 1918.

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EXPLOSION ENGINE WITH DY NAMOMAGNETIC IGNITION.

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Patented July 9, 1918. w 2 SHEETS-SHEET 2. 5mm

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. EXPLCSION-ENGINE WITH DYNAMOMAGNE'IIC IGNITION.

Specification of Letters Patent.

Patented July 9, 1918.

Application filed August 31, 1915. Serial No. 48,271.

To all whom it may concern."

Be it known that I, PIERRE BOSS'U, engineer, citizen of the French Republic, residing at Paris, France, have invented certain new and useful Improvements in Explosion- Engines with Dynamomagnetic Ignition, of

which the following is a specification.

This invention relates to explosion engines with dynamo magnetic ignition, and more particularly to such apparatus of this type as are especially applicable to motor vehicles. i

It has for its object chiefly so to build apparatus of the kind in question as to render their manufacture less cumbersome and much cheaper than hitherto.

It consists chiefly also in having recourse, for the purpose of constructing the coupling to be adapted to apparatus of the kind in question for the connection thereto of the dynamo andof the magneto, to a speed modifyingcontrivance and; on the other hand, as is rendered possible by the use of such a coupling, for the purpose of constituting the dynamo of the said apparatus to a dynamo rotating at a speed different from that at which the magneto should rotate, and, in particular to a dynamo rotating at a higher speed than the magneto and being relatively of very small dimensions.

Apart from this principal arrangement, the invention consists incertain other features which will be hereinafter more specifically explained with reference to the acconmanying drawings, in which Figure 1 illustrates, by way of example, in elevation and partly in section, an engine arrangement for automobile vehicles according to this invention.

2 shows in axial section on alarger scale the coupling arrangement, and

Fig. 3 is an elevation, with certain parts in section, of a modification of the engine arrangement according to this invention.

As shown by way of example in Fig. 1, a four-cylinder explosion engine A for automobile vehicles is to be combined with a lighting dynamo and an ignition magneto, so that these two elements are grouped tandem-fashion at one of the lateral sides of the engine.

To this end, according to this invention, the magneto C is arranged to be driven at normal speed by the engine A; that is to ea th 1 f shaft. and being I? a a magneto for ignition. A dynamo B is then so arranged that on being driven at double the speed referred to, it may perform its usual function. This dynamo B is arranged in the usual manner at one of the lateral sides of the said engine A, and is coupled with the shaft of the engine so that it is driven by said shaft, when the engine rotates, at double the speed of the engine shaft.

Provision is made of a speed modifying device D, which enables the speed to be modified from 2 to l, and which may be interposed between the said dynamo B and the magneto C, so that in transmitting the movement from the former to the latter, it reduces the speed to half; the dynamo and magneto being arranged in tandem.

In this way an arrangement is obtained which answers completely the purpose above indicated.

In the described or a similar installation, recourse may behad for the purpose of providing a suitable speed modifier, to any ordinary mechanism of this kind or, by preference, to the following means:

A toothed gear wheel I) secured to the extremity of the shaft 139 of the dynamo B; a gear wheel 0 mounted similarly on the corresponding end of the shaft C of the magneto C; and a pair of integral gear wheels Z) and c, of which the gear I) is of double the diameter of the gear 6 while the gear 0 has the same diameter as the gear 0, this compound gear 6, 0 being mounted on a common shaft (Z. This shaft (Z is journaled by means of ball hearings in a casing D secured to supporting portions formed on the bearings D of the shafts 13 and G and since the said supporting portions are by preference cylindrical and co-aXial with the said shafts, it is possible to impart to the casing D an angular displacement with regard to the displacement of the magneto, after which the casing D is fixed on the said carrying parts by means of screws 1).

According to Fig. 3, use is made, in combination with the dynamo B, of two speed changing devices arranged respectively at the two ends of the dynamo and forming a combined whole with the said dynamo such that when the latter is arranged in an existing installation between the transmission elements for the actuation the magneto and the latter itself, the said magneto is able rotating at the same speed as if the dynamo had not been interposed between it and its control, whereas the dy- V namo rotates at a different speed.

As shown, in the casing of the dynamo B is journaled at each end a trunnion f, the axis of which is parallel to the shaft B of the armature, and interposed between each of these trunnions and the adjacent extremity of the armature shaft is a change speed gear constituted preferably by an internally toothed gear wheel f, which may be integral with or rigidly connected to the trunnion, and by a gear wheel 6 mounted on the adjacent end of the armature shaft, the ratio of these gear wheels being so calculated that the two trumiions f rotate at the same speed (that of the shaft C and that the armature shaft rotates at a.determined speed other than that of the two trunnions, for example at double that speed.

In this way a structure is obtained con-i stituted by a dynamo and by two changespeed devices, one of whichlatter can be directly attached by means of a flexible joint 9 to the driving shaft, in place of the magnetoC, while the magneto is attached by a flexible joint h to the other changespeed device, as a result of which it is possible to transform in a very simple manner existing installations comprising an eXplosion engine and a magneto driven by the shaft of the said engine into an installation hardly more cumbersome and comprising, moreover, a dynamo. V

It is obvious that the invention is in no wise limited. to the particular structure illustrated, but is susceptible of modification within. its legitimate scope as claimed. hat I claim and desire to protect by -1. The combination, with an explosion engine; of a dynamo having its armature shaft connected with the engine shaft to be driven therefrom at a speed higher than that of the engine; a magneto arranged in tandem with said dynamo armature shaft; and a driving connection, including a speedreducing device, between said dynamo shaft and the magneto shaft for driving the latter from the former.

2. The combination, with an explosion engine; of a dynamo; a driving connection, including a speedaccelerating device, between the engine shaft and the dynamo armature shaft; a magneto arranged in tandem with said dynamo armature shaft; and

a driving connection, including a speedre-V ducing device, between said dynamo, shaft and the magneto shaft for driving the latter from the former.

3. The combination, with an explosion engine; of a dynamo provided at each end of its case with a trunnion, said trunnions being disposed in alinement with each other and parallel with the armature shaft of the dynamo, one of said trunnions being connected with the engine shaft to be driven there from; a magneto having its shaft connected with the outer trunnion;a speed-accelerating device between oneend of the dynamo armature shaft and the trunnion'connected with the engine shaft and a speed-reducing device between the other end of said dynamo armature shaft and the trunnion connected with the magneto shaft.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. v

l V PIERRE BOSSU.

Vitnesses CHAS. P. PREssLY,

PAUL BLUivL' Copies of this patentmay be obtained for five cents each, by addressing the Commissioner of Patents,

' e Washington, D. 0. V 

